Photoshop: "Open in 32-bit mode" not working on OS X/CS5

i have done all of the following and still it open in 64 bit mode. what to do? i need 32bit mode.
Select the Adobe Photoshop CS5 application file, installed by default in the Applications/Adobe Photoshop CS5 folder.
Choose File > Get Info, and select Open in 32 Bit Mode. (Deselect this option to run Photoshop CS5 in 64-bit mode)